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check my work please!

posted by on .

ok i have to divide complex numbers:

question is: 1-2i+i^3/1+i

this is what i did:

1-2i+i(-i)/1+i
1-2i-i^2/1+i
1-2i-i(-1)/1+i
1-2i+i/1+i
1-3i/1+i*1-i/1-i
1-i-3i+3i^2/1-i+i-i^2
1-i-3i+3(-1)/1-i^2
1-i-3i-3/1-(-1)
1-4i-3/2
-2-4i/2
my answer is -2i-1

is that right?

  • math help!!! - ,

    ok i have to divide complex numbers:

    question is: 1-2i+i^3/1+i

    this is what i did:

    1-2i+i(-i)/1+i
    1-2i-i^2/1+i
    1-2i-i(-1)/1+i
    1-2i+i/1+i
    1-3i/1+i*1-i/1-i
    1-i-3i+3i^2/1-i+i-i^2
    1-i-3i+3(-1)/1-i^2
    1-i-3i-3/1-(-1)
    1-4i-3/2
    -2-4i/2
    my answer is -2i-1

    is that right?

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